Warp beam



July 14, 1953 C. P. BERGSTROM WARP BEAM Filed May 4, 1948 FIG.I

l N VE NT OR CARL f? BERGSTROM ATTO RN EY Patented July 14, 1953 ,UNITEDSTATES PATENT OFFICE 2,645,433 WARP BEAM Carl P. Bergstrom, Millbury,Mass, assignor to Crompton & Knowles Loom Works, Worcester, Mass, acorporation of Massachusetts I Application May 4, 1948,-S erial-No.24,942

This invention relatesto improvements in warp beams and it is thegeneral object of the invention to provide an improved form of beam headusable more particularly on warp beams of large diameter.

When warp beams are provided with heads of large diameter there islikelihood that the end pressure of the warp. threads will deflect theheads sufficiently to interfere with the winding operation and also thewarp letoff operation when the beam is in aloom. Ordinarily, the beamhasa hub or the like which. extends along and in engagement with the barrelof the beam. It is desirable that as much as possible of the length ofthe warp beam be available for the warp space, and for this reason thehub should be short. With large diameter beams, however, the hub asheretofore constructed cannot be long enough to give the warp headflange adequate support without sacrificing length of the warp space.

It is an important object of the present invention to provide a warphead with a hub of much larger diameter than that of the beam barrel,and supply a support member or disk clamped to the barrel to have closefitting supporting engagement with the hub. In this way the warpengaging part of the warp head is braced at points much farther from thecircumference of the barrel than has been possible heretofore anddeflection under the end force exerted by the warp threads is greatlyreduced.

It is a more specific object of the invention to provide a disk withinternal screw threads to permit longitudinal adjustment along screwthreads on the barrel and clamp the disk in any desired position alongthe barrel so that the outer periphery can support a large diameter hubon the warp head flange at points spaced a considerable distance fromthe barrel.

With these and other objects in view which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein a convenient embodiment of myinvention is set forth,

Fig. 1 is a front elevation of a warp beam made according to the presentinvention,

Fig. 2 is a vertical section on line 2-2 of Fig. 1,

a Fig. 3 is a vertical section on line 33 of Fig.2,

Figs. 4 and 5 are enlarged horizontal sections on lines 4- -4 and 5--5,respectively, of Fig. 2,

.Fig. 6 is a detailed vertical section on line 66 ofFig. 4, and

Fig. 7 is a diagrammatic view setting forth the advantages of theinvention.

a ClailIlS. (01.. aga -12:1)

,Referring particularly to Fig. 1, the warp beam comprises .a barrel l0which'may be made of ,a metal ,tube having supporting gudgeons llsecured .to the ends thereof. Each end of the barrel .is provided withexternal screw threads .II2 whichafford adjustment of a warp beam headI-I alongthe barrel. The head H comprises two principal parts one ofwhich is a preferablyflat support member l5, which may be in the form ofa disk, and the other of which is a warp engaging flange 16 secured tothe member [5. The disk isprovided with internal screw threads II"!which fit the screw threads I 2 and is split radially to form a slot 1.8which extends from the barrel to the periphery l 9 of member. 15. Theperiphery 1.9 is preferably cylindrical and concentric with the internalthreads I! and the barrel I0, .and spaced a considerable distanceradially from the barrel.

A clamping screw 20, shown more particularly in Fig. 4, is provided withscrew threads 2| tapped into .a screw threaded hole 22 in that part ofthe disk 15 to the right of slot [8 as viewed in Fig. 2. The screw 20 isprovided with shank 23 extending through a clear hole 24 aligned withthe tapped hole 22 on the opposite side of the slot I8. Ahead 25 on thescrew 20 is formed with a socket 26 to receive a socket wrench by meansof which the screw 20 may be turned into and out of the hole .22 totighten and slacken the disk relatively to the barrel. The screw 20 islocated between an accurately finished flat pressure surface 21 ofthedisk which abuts another accurately finished flat pressure surface 28 onthe flange 16 and'the outer surface 29 of the member [5.

The warp engaging flange I6 is formed with a flat web 30 having a warpengaging surface 3! andhavinga hub 32the inner surface 33 of which isturnedaccurately to have a close fit with periphery 19 of disk I5.Surface 33 is cylindrical and concentric with the axis of barrel I0, andis spacedpa considerable distance from the barrel I 0. The flange I6 maybe made of any desired metal, such as magnesium or an alloy thereof.

The head H is provided with holding screws 36, three of which are shownin Fig. 2. The disk is .provided with transverse clear holes 31 some-What larger than the diameter ofthe screws 35, and the latter are tappedinto screw threaded holes 38 in part 39 of web .30 which may be thickerthan thelouter part 40 of the web. Each screw 36. has a head 4!locatedina recess 42 formed in. the disk lias part of hole 31. A washer43 is located between the head 4| and that part of i 32 and has atapered end or nose 46 aligned with slot I8, see Fig. 2. The hub 32 alsohas an aperture or opening 47 aligned with holes 22 and 24 to receive awrench or similar tool not shown for cooperation with the socket head 25of the clamping screw 20. The surface 28 of web part 38 and the internalfinished surface 33 on hub 32 define a pocket or recess 48 to receiveand inclose the disk I5. As shown in Fig. 6 the disk is considerablythicker than the web 30.

After the parts have been made substantially as described the disk willbe fitted into the recess 48 with the spreading screw 45 backed'off butaligned with slot I8. The tapered end 46 of screw 45 may if desiredproject into slot I8 to guide the disk and register the holes 37 withtapped holes 38. The holding screws 36 are then turned in holes 38 butleft loose enough to permit contraction of disk i5. The screw 20 will beloose andaligned with the perforation 41. The head H is then ready forapplication to the beam I and can be turned on the corresponding screwthread I2 to move along the barrel to the desired position. Theclamping: screw 20 will then be tightened to establish firm holdingconnection between the barrel and the disk. The holding screws 36 arethen tightenedto draw flange I into close fitting relation with disk I5.As shown in Fig. 3 the outer periphery IQ of the disk will be in closeengagement with the greater part of the interior surface 33 of the hub32 at points spaced from barrel It.

It is to be understood that each of the holding screws 36 will passthrough a hole 37 substantially as shown in Fig. 5 to permit the disk I5to fit into the recess 48 without requiring a high degree of accuracy inplacement of the tapped holes 38. When it is desired to change theadjusted position of the head H along the barrel I0 the screws 36 can beslackened and the clamping screw loosened, after which turning of thehead 1-1 will move it to a new position on the barrel. If it is foundthat the disk sticks too tightly to the barrel ID to permit free turningof head H, the screw may be turned in toward the barrel until itstapered end 46 enters the slot I8 to spread the lower spaced parts ofthe disk as viewed in Fig. 2.

The advantages of the present invention are set forth diagrammaticallyin Fig. 7. In the usual type of warp beam the hub of the flange is closeto and in engagement with the barrel I0, and the amount of support whichit can give to the outer part of the web 33 is comparatively small.Thus, line a, Fig. 7, represents the warp engaging surface and the lineb represents the length of the hub as ordinarily located. These twolines and line 0 define a triangle with a rather small base which is notable to afford much support for the outer part or rim of flange I6, andthe latter will be deflected considerably as indicated by line 01 whenthe beam is full of warp.

Lines e, f and g in Fig. 7 indicate the advantage of the presentinvention. Line e corresponding to the width of surface IS on disk I5 ithe base of a triangle including lines 1 and the outer part of line a.This second triangle has a base which proportionately is much broaderthan base I) of the first triangle. Base 6, however, i no longer thanbase b therefore occupies no more space longitudinally along the barrelthan does base 1). Because this second triangle is relatively muchstiffer than the first triangle there will be very little if any outwarddeflection of the rim of flange I6. Such deflection as does occur, indi-4 cated by line 9', will be very much less than the deflectionrepresented by line (1.

From the foregoing it will be seen that I have provided a warp head ofsimple construction wherein the outer parts of a warp engaging flange oflarge dimension are supported by a support member or disk I5 having adiameter very much greater than that of the barrel ID. This result isaccomplished without increasing the overall thickness of the headmeasured along the barrel, and the disk I5 can be housed within the hub32, as shown in Fig. 3. the screw threads I2 by means of a clampingscrew 20 whichis confined within the disk, and the holding screws 35secure the parts I5 and I6 together tightly so that the entire head H isrigidly held in adjusted position along the barrel. Screws 35 also alignthe aperture 4! with the screw 25. Furthermore, should it be necessaryto release the disk from the threads l2 when making a new adjustment ofthe head the spreading screw 45 can be turned inwardly to move itstapered end 46 into the slot It to effect a slight spreading of thelower parts of the disk as viewed in Fig. 2. I do not wish to be limitedto the particular procedure described for assembling and tightening thewarp head. Furthermore, certain features of the invention do not requirethe external threads I2 and the internal threads H. In actual practicewarp heads made as set forth herein using warp flanges I6 of largediameter show much less deflection at the outer rim than do heads madeaccording to previous practice, and this is due in large measure to thefact that the hub 32 of flange I8 is supported by rim I9 of disk. orsupport member I5 at points spaced radially a considerable distance fromthe barrel.

Having thus described my invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention and I do'not wishto be limited to the details herein disclosed, but what I claim is:

1 In a warp beam having a barrel, 'a support member surrounding thebarrel and having a pcriphery spaced radially from the barrel, saidsupport member having a slot therein extending from the barrel to saidperiphery, a clamping screw extending across said slot to clamp thesupport member to the barrel, a warp engaging flange, a hub formed onsaid flange engaging said periphery, and a spreading screw tapped intosaid hub in alignment with said slot to enter the latter to spread thesupport member relatively to the barrel when the clamping screw isreleased.

2. A warp beam having a barrel, a head on the barrel, a warp engagingflange on the head, an annular hub on the flange coaxial with thebarrel, a support fitting in said hub, said support being threaded tothe barrel for adjusting the head along the barrel, said flange andsupport having faces lying approximately in planes perpendicular to theaxis of the beam, and means passing through either the flange or thesupport into the other of said elements for clamping the adjacent facesthereof together.

3. A warp beam having a barrel provided with external screw threads, ahead on the barrel, a

The disk I5 is clamped to approximately in plane perpendicular to theaxis of the beam, and screws passing through the support and into saidflange for clamping the pressure faces together and for holding saidperiphery and the internal surface of said hub in position to engageeach other radially.

' CARL P. BERGS'DROM.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date Sands July 6, 1909 Martiti June 30, 1936 Leinbach Jan. 17,1939 McCaslin Feb. 5, 1946

